/* Complex sine hyperbole function for double. Copyright (C) 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <complex.h> #include <fenv.h> #include <math.h> #include "math_private.h" __complex__ double __csinh (__complex__ double x) { __complex__ double retval; int negate = signbit (__real__ x); int rcls = fpclassify (__real__ x); int icls = fpclassify (__imag__ x); __real__ x = fabs (__real__ x); if (rcls >= FP_ZERO) { /* Real part is finite. */ if (icls >= FP_ZERO) { /* Imaginary part is finite. */ double sinh_val = __ieee754_sinh (__real__ x); double cosh_val = __ieee754_cosh (__real__ x); double sinix, cosix; __sincos (__imag__ x, &sinix, &cosix); __real__ retval = sinh_val * cosix; __imag__ retval = cosh_val * sinix; if (negate) __real__ retval = -__real__ retval; } else { if (rcls == FP_ZERO) { /* Real part is 0.0. */ __real__ retval = __copysign (0.0, negate ? -1.0 : 1.0); __imag__ retval = __nan ("") + __nan (""); #ifdef FE_INVALID if (icls == FP_INFINITE) feraiseexcept (FE_INVALID); #endif } else { __real__ retval = __nan (""); __imag__ retval = __nan (""); #ifdef FE_INVALID feraiseexcept (FE_INVALID); #endif } } } else if (rcls == FP_INFINITE) { /* Real part is infinite. */ if (icls == FP_ZERO) { /* Imaginary part is 0.0. */ __real__ retval = negate ? -HUGE_VAL : HUGE_VAL; __imag__ retval = __imag__ x; } else if (icls > FP_ZERO) { /* Imaginary part is finite. */ double sinix, cosix; __sincos (__imag__ x, &sinix, &cosix); __real__ retval = __copysign (HUGE_VAL, cosix); __imag__ retval = __copysign (HUGE_VAL, sinix); if (negate) __real__ retval = -__real__ retval; } else { /* The addition raises the invalid exception. */ __real__ retval = HUGE_VAL; __imag__ retval = __nan ("") + __nan (""); #ifdef FE_INVALID if (icls == FP_INFINITE) feraiseexcept (FE_INVALID); #endif } } else { __real__ retval = __nan (""); __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nan (""); } return retval; } weak_alias (__csinh, csinh) #ifdef NO_LONG_DOUBLE strong_alias (__csinh, __csinhl) weak_alias (__csinh, csinhl) #endif